What will happen if similar device is used by two different user in case of offline mode?

What will happen if similar device is used by two different user in case of offline mode?

If the same device is used by two different user, then the data will be uploaded respectively.Suppose there are two users User 1 & User 2User 1 collects the data and logout the application without uploading the data and User 2 login the application in the same device and collects another data. In this instance , once the device comes in contact with the internet the data will be uploaded according to the users respectively.